CN201097239Y - Heating control device with dual-core heating line - Google Patents

Heating control device with dual-core heating line Download PDF

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Publication number
CN201097239Y
CN201097239Y CNU2007201812079U2007201812079U CN200720181207U CN201097239Y CN 201097239 Y CN201097239 Y CN 201097239Y CN U2007201812079U2007201812079 U CNU2007201812079U2007201812079 U CN U2007201812079U2007201812079U CN 200720181207 U CN200720181207 U CN 200720181207U CN 201097239 Y CN201097239 Y CN 201097239Y
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resistance
circuit
joins
pin
twin
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CNU2007201812079U2007201812079U
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Chinese (zh)
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张隆皇
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Abstract

The utility model relates to a heating control device with a dual-core heating wire. The heating control device comprises a dual-core heating wire, a control device, wherein the dual-core heating wire is provided with a PTC heating resistance wire, an NTC resistance layer and a heating wire, one end of the dual-core heating wire is connected with an alternating current power supply, the other end is connected with a load detection circuit, one end or the other end of the heating wire is short-circuited, or the both ends of the heating wire are short-circuited, and the heating wire is connected with an NTC detection circuit; the control device is provided with a load detection circuit, a first comparator, a second comparator, a controlling circuit, an NTC detection circuit and a PTC detection circuit; the heating control device simultaneously has the characteristics of the PTC and the NTC, performs heating through using the PTC heating resistance wire, achieves the purposes of controlling and detecting the product temperature through the second comparator, the controlling circuit and the PTC detection circuit, then utilizes the first comparator, the controlling circuit and the NTC detection circuit to detect the leakage current of the NTC resistance layer and control the secondary over temperature protection of the total temperature or the partial temperature of the heating wire, and further achieves the purpose that the heating control device with the dual-core heating wire is obtained.

Description

Tool twin-core heating line heating control device
Technical field
The utility model relates to a kind of tool twin-core heating line heating control device; especially refer to a kind of twin-core heating line and control device thereof that has ptc characteristics and NTC characteristic simultaneously; make the NTC resistive layer that control device can utilize heating line middle layer to have the NTC characteristic; to detect the middle layer leakage current; reach control heating line bulk temperature or local temperature height; to reach the purpose of secondary overheat protector; can utilize simultaneously PTC heating resistor line heating with ptc characteristics; and the size of current of detection PTC heating resistor line; reach the purpose of control product temperature, and then reach a kind of purpose of tool twin-core heating line heating control device.
Background technology
Press, tw Taiwan patent gazette application number No. 094101339 heat radiating structure and temperature control method thereof, it comprises: a heating line, comprise that core, positive temperature are number (Positive Temperature Coefficient, PTC) assembly, insulation meltable layer and short-circuit line, the PTC assembly is connected with an end of short-circuit line, and the PTC assembly can generate heat after conduction; One controller connects the other end of PTC assembly and short-circuit line respectively, comprises a circuit board, and it is provided with an AC power phase-shaped circuit and an AC power phase delay shaping circuit;
Only, though above-mentioned heat radiating structure and temperature control method thereof are after it can work as the user and set heating-up temperature, electric current is that conducting is heated to the PTC assembly, and make the string ripple signal of input ac power phase-shaped circuit and AC power phase delay shaping circuit convert the direct current square-wave signal respectively to, and detect the phase shift variations of two shaping circuits by timing microprocessor, with the switch of control triggering electric circuit,, thereby make the heating line remain on certain working temperature so that the PTC assembly continues heating or cooling;
So, existing heating line is to utilize inside and outside heating line high temperature melting insulation meltable layer, make PTC assembly and short-circuit line contact short circuit do overheat protector, promptly can't reuse after working as the fusing of heating line excess temperature, be not inconsistent economic benefits, moreover existing heating line is when energising is heated, also cause the heating line local temperature too high heating line that burns, thus the serviceable life of the existing line that generates heat comparatively of short duration, burn easily;
Hereat; how disappearance such as above-mentioned is forgone; and provide a kind of twin-core heating line and control device thereof that has PTC/NTC simultaneously; to utilize the NTC characteristic in heating line middle layer; detect the middle layer leakage current; reach the secondary overheat protector of control heating line bulk temperature or local temperature; simultaneously to detect PTC heating resistor size of current; reach the purpose of a kind of tool twin-core heating line heating control device of control product temperature, be the place of the technical difficulties of this case utility model designer institute desire solution.
Summary of the invention
Fundamental purpose of the present utility model is promptly providing a kind of tool twin-core heating line heating control device, and it comprises:
One twin-core heating line, described twin-core heating line is provided with insulation course, PTC heating resistor line, NTC resistive layer, heater wire and heart yearn, and described PTC adds thermoelectric group line one end and AC power is joined, the other end and load detecting circuit join, behind described again heater wire one end or the heater wire other end or heater wire two terminal shortcircuits, and join with the NTC testing circuit;
One control device, described control device includes:
Dc voltage circuit, described dc voltage circuit are provided with first end and second end, described first end fuse in parallel and joining with AC power, and described second end then output DC is depressed into each circuit, uses for each circuit;
The sync signal input circuit, described sync signal input circuit is provided with first end and second end, first end of described first end and dc voltage circuit joins, described second end then with control circuit in the tripod of microchip join;
Reference voltage circuit, described reference voltage circuit is provided with direct current pressure side, first end, second end, the 3rd end and the 4th end, second end of described direct current pressure side and dc voltage circuit joins, first end of described first end and sync signal input circuit joins, the positive input angle of described second end and first comparer joins, the negative input pin of described the 3rd end and second comparer joins, and first end of described the 4th end and file position regulating circuit joins;
File position regulating circuit, described file position regulating circuit is provided with first end, second end, the 3rd end, the 4th end, the 4th end of described first end and reference voltage circuit join with control circuit in the 12 pin of microchip join, the 11 pin of the microchip in described second end and the control circuit joins, the tenth pin of the microchip in described the 3rd end and the control circuit joins, and the 9th pin of the microchip in described the 4th end and the control circuit joins;
First comparer, described first comparer is provided with direct current pressure side, earth terminal, positive input terminal, negative input end and output terminal, second end of described direct current pressure side and dc voltage circuit joins, described earth terminal ground connection, second end of described positive input terminal and reference voltage circuit joins, second end of described negative input end and NTC testing circuit joins, and the 6th pin of the microchip in described output terminal and the control circuit joins;
Second comparer, described second comparer is provided with direct current pressure side, earth terminal, positive input terminal, negative input end and output terminal, second end of described direct current pressure side and dc voltage circuit joins, described earth terminal ground connection, second end of described positive input terminal and PTC testing circuit joins, the 3rd end of described negative input end and reference voltage circuit joins, and the tenth tripod of the microchip in described output terminal and the control circuit joins;
Control circuit is provided with a microchip in the described control circuit, described microchip is provided with the pin position that is aligned to the tenth octal by first pin in regular turn;
The NTC testing circuit, described NTC testing circuit is provided with first end and second end, and the 3rd end of described first end and twin-core heating line joins, and the negative input pin of described second end and first comparer joins;
The PTC testing circuit, described PTC testing circuit is provided with first end and second end, and second end of described first end and on-off circuit joins, and the positive input pin of described second end and second comparer joins;
Load detecting circuit, described load detecting circuit are provided with first end and second end, and second end of described first end and twin-core heating line joins, and the tenth octal of the microchip in described second end and the control circuit joins;
The circuit abnormality holding circuit, described circuit abnormality holding circuit is provided with direct current pressure side, first end, second end and the 3rd end, second end of described direct current pressure side and dc voltage circuit joins, first end of described first end and load detecting circuit joins, first end of described second end and twin-core heating line and first end of reference voltage circuit join, and first end of described the 3rd end and on-off circuit joins;
On-off circuit, described on-off circuit is provided with first end, second end and the 3rd end, the 3rd end of described first end and circuit abnormality holding circuit joins, and first end of described second end and PTC testing circuit joins, and the 17 pin of the microchip in described the 3rd end and the control circuit joins;
Function selector circuit, described function selector circuit are provided with first end and second end, and the octal of the microchip in described first end and the control circuit joins, the direct ground connection of described second end;
The state display lamp circuit, described state display lamp circuit is provided with several luminescence components, and described state display lamp circuit is provided with first end, second end, the 3rd end, the 4th end and five terminal, the 15 pin of the microchip in described first end and the control circuit joins, first pin of the microchip in described second end and the control circuit joins, the crus secunda of the microchip in described the 3rd end and the control circuit joins, the 7th pin of the microchip in described the 4th end and the control circuit joins, and first end of described five terminal and function selector circuit joins;
The beneficial effects of the utility model are compared with the prior art; by twin-core heating line of the present utility model PTC is arranged simultaneously; the NTC characteristic; make the utility model can utilize the heating of PTC heating resistor line; and by second comparer; control circuit; the PTC testing circuit; reach control and testing product temperature purpose; utilize first comparer again; control circuit; the NTC testing circuit; to detect NTC resistive layer leakage current; reach control heating line bulk temperature or local temperature height; carry out the secondary overheat protector, and then reach a kind of purpose of tool twin-core heating line heating control device.
Description of drawings
Fig. 1 is a calcspar of the present utility model;
Fig. 2 is a twin-core heating line synoptic diagram in the utility model;
Fig. 3 is a circuit diagram of the present utility model;
Fig. 4 detects heating and stops heating action situation for PTC in the utility model;
Fig. 5 is that NTC detects and secondary overheat protector action situation in the utility model;
Fig. 6 is a circuit abnormality holding circuit action situation in the utility model;
Fig. 7 is another twin-core heating line synoptic diagram in the utility model;
Fig. 8 is a twin-core heating line synoptic diagram again in the utility model;
Fig. 9 is circuit abnormality holding circuit and another embodiment of on-off circuit in the utility model;
Figure 10 is the circuit operation situation of another embodiment in the utility model.
Description of reference numerals
The 1-AC power; The 2-control device; The 21-dc voltage circuit; 211-first end; 212-second end; 22-sync signal input circuit; 221-first end; 222-second end; The 23-reference voltage circuit; 231-first end; 232-second end; 233-the 3rd end; 234-the 4th end; 235-direct current pressure side; 24-file position regulating circuit; 241-first end; 242-second end; 243-the 3rd end; 244-the 4th end; 251-first comparer; 2511-positive input pin; 2512-bears input pin; The 2513-output pin; 2514-direct current pressure side; The 2515-earth terminal; 252-second comparer; 2521-positive input pin; 2522-bears input pin; The 2523-output pin; 2524-direct current pressure side; The 2525-earth terminal; The 26-load detecting circuit; 261-first end; 262-second end; The 271-NTC testing circuit; 2711-first end; 2712-second end; The 272-PTC testing circuit; 2721-first end; 2722-second end; 28-circuit abnormality holding circuit; 281-first end; 282-second end; 283-the 3rd end; 284-direct current pressure side; The 29-on-off circuit; 291-first end; 292-second end; 293-the 3rd end; The 3-fuse; 4-state display lamp circuit; 41-first end; 42-second end; 43-the 3rd end; 44-the 4th end; The 45-five terminal; 5-twin-core heating line; The 54-heart yearn; The 55-heater wire; 551-first end; 552-second end; The 56-NTC resistive layer; 57-PTC heating resistor line; 571-first end; 572-second end; The 58-insulation course; 59-PTC heating resistor line; The 6-control circuit; The 61-microchip; 6101-first pin; The 6102-crus secunda; The 6103-tripod; 6104-the 4th pin; 6105-the 5th pin; 6106-the 6th pin; 6107-the 7th pin; The 6108-octal; 6109-the 9th pin; 6110-the tenth pin; 6111-the 11 pin; 6112-the 12 pin; 6113-the tenth tripod; 6114-the 14 pin; 6115-the 15 pin; 6116-the 16 pin; 6117-the 17 pin; 6118-the tenth octal; The 7-function selector circuit; 71-first end; 72-second end; R1-first resistance; R2-second resistance; R3-the 3rd resistance; R4-the 4th resistance; R5-the 5th resistance; R6-the 6th resistance; R7-the 7th resistance; R8-the 8th resistance; R9-the 9th resistance; R10-the tenth resistance; R11-the 11 resistance; R12-the 12 resistance; R13-the 13 resistance; R14-the 14 resistance; R15-the 15 resistance; R16-the 16 resistance; R17-the 17 resistance; R18-the 18 resistance; R19-the 19 resistance; R20-the 20 resistance; R21-the 21 resistance; R22-the 22 resistance; R23-the 23 resistance; R24-the 24 resistance; R25-the 25 resistance; R26-the 26 resistance; R27-the 27 resistance; R28-the 28 resistance; R29-the 29 resistance; R30-the 30 resistance; R31-the 31 resistance; R32-the 32 resistance; R33-the 33 resistance; R34-the 34 resistance; R35-the 35 resistance; R36-the 36 resistance; R37-the 37 resistance; R38-the 38 resistance; R39-the 39 resistance; R40-the 40 resistance; D1-first diode; D2-second diode; D3-the 3rd diode; D4-the 4th diode; D5-the 5th diode; D6-the 6th diode; D7-the 7th diode; The ZD1-silicon reference diode; The ZD2-silicon reference diode; C1-the-electric capacity; C2-second electric capacity; C3-the 3rd electric capacity; C4-the 4th electric capacity; C5-the 5th electric capacity; C6-the 6th electric capacity; C7-the 7th electric capacity; C8-the 8th electric capacity; C9-the 9th electric capacity; C10-the tenth electric capacity; L1-first luminescence component; L2-second luminescence component; L3-the 3rd luminescence component; L4-the 4th luminescence component; L5-the 5th luminescence component; T1-first thyristor; The A1-anode; The K1-negative electrode; The G1-gate; T2-second thyristor; The A2-anode; The K2-negative electrode; The G2-gate; TRAIC1-first bidirectional silicon-controlled rectifier; A11-first end; A12-second end; The G11-control end; TRAIC2-second bidirectional silicon-controlled rectifier; A21-the-end; A22-second end; The G21-control end; The Q1-transistor; The B-base stage; The C-collection utmost point; The E-emitter-base bandgap grading; SW1-selects button; The VCC-DC voltage.
Embodiment
Below in conjunction with accompanying drawing, to this novel above-mentionedly is described in more detail with other technical characterictic and advantage.
See also Fig. 1-shown in Figure 3, the utility model provides a kind of tool twin-core heating line heating control device, and it comprises:
One twin-core heating line 5, described twin-core heating line 5 innermost layers are heart yearn 54, spiral is arranged with heater wire 55 on the described heart yearn 54, be covered with NTC resistive layer 56 in described heater wire 55 outsourcings again, on the described NTC resistive layer 56 again spiral be arranged with PTC heating resistor line 57, form at described PTC heating resistor line 57 outsourcing insulating layer coatings 58 again, and first end 571 that described twin-core heating line 5 its PTC add thermoelectric group line 57 is connected to AC power 1, second end 282 with circuit abnormality holding circuit 28, described PTC adds first end 261 that thermoelectric second end 572 of organizing line 57 then is connected to load detecting circuit 26, first end 281 with circuit abnormality holding circuit 28, first end 551 of the heater wire 55 of described again twin-core heating line 5, or second end 552, or first end 551 and second end 552 mutually after the short circuit, be connected to first end 2711 of NTC testing circuit 271;
One control device 2, described control device 2 includes:
Dc voltage circuit 21, first end 211 of described dc voltage circuit 21 connects a fuse 3 and is connected to AC power 1, described again dc voltage circuit 21 is provided with first end 211 and second end 212,212 output dc voltage VCC of second end of described dc voltage circuit 21 use for each circuit, and described again dc voltage circuit 21 includes: first capacitor C 1; Second capacitor C 2, described second capacitor C, 2 one end ground connection; The 3rd capacitor C 3, described the 3rd capacitor C 3 one end ground connection; The 4th capacitor C 4, described the 4th capacitor C 4 one end ground connection; First resistance R 1, described first resistance R, 1 Shu end joins with first capacitor C 1; Pseudo-ginseng resistance R 37, described pseudo-ginseng resistance R 37 1 ends and first resistance R 1 are joined, and the other end then joins with first capacitor C 1; Silicon reference diode ZD1, described silicon reference diode ZD1 one end and first resistance R 1 are joined, and the other end then connects ground connection; The first diode D1, the described first diode D1, one end and silicon reference diode ZD1 join, and the other end then joins with second capacitor C 2, the 3rd capacitor C 3 and the 4th capacitor C 4;
Control circuit 6, described control circuit 6 includes: a microchip 61, described microchip 61 is provided with first pin 6101, crus secunda 6102, tripod 6103, the 4th pin 6104, the 5th pin 6105, the 6th pin 6106, the 7th pin 6107, octal 6108, the 9th pin 6109, the tenth pin 6110, the 11 pin 6111, the 12 pin 6112, the tenth tripod 6113, the 14 pin 6114, the 15 pin 6115, the 16 pin 6116, the 17 pin 6117, the tenth octal 6118, and described the 14 pin 6114 joins with second end 212 of dc voltage circuit 21, and described again the 5th pin 6105 is to connect ground connection; The 13 resistance R 13, described the 13 resistance R 13 Shu end joins with second end 212 of dc voltage circuit 21; The 18 resistance R 18, second end 212 of described the 18 resistance R 18 1 ends and dc voltage circuit 21 joins; The 19 resistance R 19, the 4th pin 6104 of described the 19 resistance R 19 1 ends and the 18 resistance R 18 and microchip 61 joins, and the other end then connects ground connection; The 5th capacitor C 5, the 16 pin 6116 of described the 5th capacitor C 5 one ends and the 13 resistance R 13 and microchip 61 joins, and the other end then connects ground connection;
First comparer 251, the output pin 2513 of described first comparer 251 is connected to the 6th pin 6106 of the microchip 61 in the control circuit 6, described again first comparer 251 is provided with direct current pressure side 2514, earth terminal 2515, positive input pin 2511, negative input pin 2512 and output pin 2513, second end 212 of described direct current pressure side 2514 and dc voltage circuit 21 joins, and described earth terminal 2515 connects ground connection;
Second comparer 252, the output pin 2523 of described second comparer 252 is connected to the tenth tripod 6113 of the microchip 61 in the control circuit 6, described again second comparer 252 is provided with direct current pressure side 2524, earth terminal 2525, positive input pin 2521, negative input pin 2522 and output pin 2523, second end 212 of described direct current pressure side 2524 and dc voltage circuit 21 joins, and described earth terminal 2525 connects ground connection;
Sync signal input circuit 22, first end 221 of described sync signal input circuit 22 is connected to first end 211 of dc voltage circuit 21, described again sync signal input circuit 22 is provided with first end 221 and second end 222, the tripod 6103 of the microchip 61 in 222 at described second end and the control circuit 6 joins, and described again sync signal input circuit 22 is second resistance R 2;
Reference voltage circuit 23, first end 231 of described reference voltage circuit 23 is connected to first end 221 of sync signal input circuit 22, described again reference voltage circuit 23 is provided with direct current pressure side 235, first end 231, second end 232, the 3rd end 233 and the 4th end 234, second end 212 of described direct current pressure side 235 and dc voltage circuit 21 joins, the positive input pin 2511 of described second end 232 and first comparer 251 joins, the negative input pin 2522 of described the 3rd end 233 and second comparer 252 joins, described the 4th end 234 joins with first end 241 of file position regulating circuit 24, and described again reference voltage circuit 23 includes: the second diode D2; The 3rd diode D3, described the 3rd diode D3 one end and the second diode D2 join; The 3rd resistance R 3, described the 3rd resistance R 3 one ends and the 3rd diode D3 join; The 4th resistance R 4, described the 4th resistance R 4 one ends and the 3rd resistance R 3 are joined; The 5th resistance R 5, described the 5th resistance R 5 one ends and the 4th resistance R 4 are joined; The 6th resistance R 6, described the 6th resistance R 6 one ends and the 5th resistance R 5 are joined; The 7th resistance R 7, described the 7th resistance R 7 one ends and the 6th resistance R 6 are joined; The 8th resistance R 8, described the 8th resistance R 8 one ends and the 7th resistance R 7 are joined; The 14 resistance R 14, described the 14 resistance R 14 1 ends and the 3rd resistance R 3; The 15 resistance R 15, described the 15 resistance R 15 1 ends and the 14 resistance R 14 are joined, and the other end then connects ground connection; The 6th capacitor C 6, described the 6th capacitor C 6 one ends and the 15 resistance R 15 are joined, and the other end then connects ground connection;
File position regulating circuit 24, first end 241 of described file position regulating circuit 24 is connected to the 4th end 214 of reference voltage circuit 21, the 12 pin 6112 with microchip 61 in the control circuit 6, described again file position regulating circuit 24 is provided with first end 241, second end 242, the 3rd end 243, the 4th end 244, the 11 pin 6111 of the microchip 61 in described second end 242 and the control circuit 6 joins, the tenth pin 6110 of the microchip 61 in described the 3rd end 243 and the control circuit 6 joins, the 9th pin 6109 of the microchip 61 in described the 4th end 244 and the control circuit 6 joins, and described again file position regulating circuit 24 includes: the 9th resistance R 9; The tenth resistance R 10, described the tenth resistance R 10 1 ends and the 9th resistance R 9 are joined; The 11 resistance R 11, described the 11 resistance R 11 1 ends and the tenth resistance R 10 are joined; The 12 resistance R 12, described the 12 resistance R 12 1 ends and the 11 resistance R 11 are joined, and the other end then connects ground connection;
NTC testing circuit 271, first end 2711 of described NTC testing circuit 271 is connected to first end 551 or second end 552 or first end 551 and second end 552 short circuit mutually of the heater wire 55 of twin-core heating line 5, described again NTC testing circuit 271 is provided with first end 2711 and second end 2712, the negative input pin 2512 of described second end 2712 and first comparer 251 joins, and described again NTC testing circuit 271 includes: the 16 resistance R 16; The 17 resistance R 17, described the 17 resistance R 17 1 ends connect ground connection; The 4th diode D4, described the 4th diode D4 one end and the 17 resistance R 17 are joined; The 7th diode D7, described the 7th diode D7 one end joins with the 16 resistance R 16 and the 4th diode D4, and the other end then connects ground connection; The 7th electric capacity, described the 7th electric capacity one end and the 4th diode D4 join, and the other end then connects ground connection;
PTC testing circuit 272, second end 2722 of described PTC testing circuit 272 is connected to the positive input pin 2521 of second comparer 252, described again PTC testing circuit 272 is provided with first end 2721 and second end 2722, and described again PTC testing circuit 272 includes: the 25 resistance R 25; The 26 resistance R 26, described the 26 resistance R 26 1 ends and the 25 resistance R 25 are joined, and the other end then connects ground connection; The 27 resistance R 27, described the 27 resistance R 27 1 ends and the 26 resistance R 26 are joined, and the other end then connects ground connection;
On-off circuit 29, the 3rd end 293 of described on-off circuit 29 is connected to the 17 pin 6117 of the microchip 61 in the control circuit 6, described again on-off circuit 29 is provided with first end 291, second end 292 and the 3rd end 293, described second end 292 joins with first end 2721 of PTC testing circuit 272, described again on-off circuit 29 includes: the second thyristor T2, and the described second thyristor T2 is provided with anode A 2, negative electrode K2 and gate pole G2; The 28 resistance R 28, the gate G2 of described the 28 resistance R 28 1 ends and the second thyristor T2 joins, and the other end then connects ground connection; The 29 resistance R 29, described the 29 resistance R 29 1 ends and the 28 resistance R 28 are joined, and the wherein said second thyristor T2 can replace by bidirectional silicon-controlled rectifier;
Load detecting circuit 26, first end 261 of described load detecting circuit 26 is connected to second end 572 that twin-core heating line 5 its PTC add thermoelectric group line 57, described again load detecting circuit 26 is provided with first end 261 and second end 262, the tenth octal 6118 of the microchip 61 in described second end 262 and the control circuit 6 joins, described again load detecting circuit 26 includes: the tenth capacitor C 10, and described the tenth capacitor C 10 1 ends connect ground connection; The 35 resistance R 35, described the 35 resistance R 35 1 ends and the tenth capacitor C 10 are joined, and the other end then connects ground connection; The 36 resistance R 36, described the 36 resistance R 36 1 ends and the 35 resistance R 35 are joined;
Circuit abnormality holding circuit 28, second end 282 of described circuit abnormality holding circuit 28 is connected to first end 51 of twin-core heating line 5, first end 231 with reference voltage circuit 23, described again circuit abnormality holding circuit 28 is provided with direct current pressure side 284, first end 281, second end 282 and the 3rd end 283, second end 212 of described direct current pressure side 284 and dc voltage circuit 21 joins, described first end 281 joins with first end 261 of load detecting circuit 26, described the 3rd end 283 joins with first end 291 of on-off circuit 29, described again circuit abnormality holding circuit 28 includes: transistor Q1, and described transistor Q1 is provided with base stage B, collection utmost point C and emitter-base bandgap grading E; The first thyristor T1, the described first thyristor T1 is provided with anode A 1, negative electrode K1 and gate pole G1; The 8th capacitor C 8; The 5th diode D5, described the 5th diode D5 one end and the 8th capacitor C 8 are joined; The 6th diode D6, described the 6th diode D6 one end and the 5th diode D5 join; The 30 resistance R 30, the 30 resistance R 30 1 ends and the 6th diode D6 join, and the other end then joins with the negative electrode K1 of the first thyristor T1; The 31 resistance R 31, described the 31 resistance R 31 1 ends and the 8th capacitor C 8 and the 5th diode D5, the other end then connects ground connection; The 32 resistance R 32, described the 32 resistance R 32 1 ends and the 31 resistance R 31 are joined, and the other end then joins with the base stage B of transistor Q1; The 33 resistance R 33, the emitter-base bandgap grading E of described the 33 resistance R 33 1 ends and transistor Q1 joins, and the other end then joins with the gate G1 of the first thyristor T1; The 34 resistance R 34, described the 34 resistance R 34 1 ends and the 30 resistance R 30 are joined, and the wherein said first thyristor T1 can replace by bidirectional silicon-controlled rectifier;
Function selector circuit 7, first end 71 of described function selector circuit 7 is connected to the octal 6108 of the microchip 61 in the control circuit 6, described again function selector circuit 7 is provided with first end 71 and second end 72, described second end 82 connects ground connection, and described again function selector circuit 7 includes: the 24 resistance R 24; One selects button SW1, and described selection button SW1 one end and the 24 resistance R 24 are joined;
State display lamp circuit 4, first end 41 of described state display lamp circuit 4 is connected to the 15 pin 6115 of the microchip 61 in the control circuit 6, described again state display lamp circuit 4 is provided with first end 41, second end 42, the 3rd end 43, the 4th end 44 and five terminal 45, first pin 6101 of the microchip 61 in described second end 42 and the control circuit 6 joins, the crus secunda 6102 of the microchip 61 in described the 3rd end 43 and the control circuit 6 joins, the 7th pin 6107 of the microchip 61 in described the 4th end 44 and the control circuit 6 joins, described five terminal 45 joins with first end 71 of function selector circuit 7, and described again state display lamp circuit 4 includes: the first luminescence component L1; The second luminescence component L2, the described second luminescence component L2, one end and the first luminescence component L1 join; The 3rd luminescence component L3; The 4th luminescence component L4, described the 4th luminescence component L4 one end and the 3rd luminescence component L3, the other end then join with the first luminescence component L1; The 5th luminescence component L5, described the 5th luminescence component L5 one end and the 4th luminescence component L4 join; The 20 resistance R 20, described the 20 resistance R 20 1 ends join with the second luminescence component L2 and the 3rd luminescence component L3, and described the 20 resistance R 20 other ends then connect ground connection; The 21 resistance R 21, described the 21 resistance R 21 1 ends and the 5th luminescence component L5 join, and described the 21 resistance R 21 other ends then connect ground connection; The 22 resistance R 22, described the 22 resistance R 22 1 ends and the 5th luminescence component L5 join; The 23 resistance R 23, described the 23 resistance R 23 1 ends and the second luminescence component L2 join;
See also shown in Figure 3, be the 21 action situations of dc voltage circuit in the utility model, when an AC power 1 arrives at dc voltage circuit 21 via fuse 3, by 1 step-down of first capacitor C, silicon reference diode ZD1 voltage stabilizing, again via after the first diode D1,2 filtering of second capacitor C, draw DC voltage VCC, use for each circuit with the supply direct current;
See also Fig. 4 and cooperate shown in Figure 3, control circuit 6 is obtained sync signal by sync signal input circuit 22 after start, and by the second end 212 supply DC voltage VCC of dc voltage circuit 21, make microchip 61 actions in the control circuit 6, the 17 pin 6117 of described microchip 61 will be exported trigger pulse, after the 29 resistance R 29 current limlitings of on-off circuit 29, the gate G2 of the second thyristor T2 of trigger switch circuit 29, make the anode A 2 and negative electrode K2 conducting of the second thyristor T2, so making AC power 1 powers smoothly to PTC heating resistor line 57 heat temperature raisings of twin-core heating line 5, pass through the 26 resistance R 26 of PTC testing circuit 272 simultaneously, the 27 resistance R 27 obtains the load current of PTC heating resistor line 57, and be converted into comparative voltage, the 25 resistance R 25 current limlitings by PTC testing circuit 272, offer the positive input pin 2521 of second comparer 252, and the negative input pin 2522 of described second comparer 252, then obtain reference voltage by the 3rd end 233 of reference voltage circuit 23, at this moment, because of the line 5 of start or twin-core heating does not just reach the temperature that the user sets, so reference voltage height of the negative input pin 2522 of the voltage ratio that positive input pin 2521 is obtained, described output pin 2523 will be exported the tenth tripod 6113 that noble potential is given the microchip 61 of control circuit, after the tenth tripod 6113 of described microchip 61 detects noble potential, the 17 pin 6117 output trigger pulses of microchip 61 will be made, make twin-core heating line 5 keep heating, ptc characteristics because of PTC heating resistor line 57, be that resistance value increases with temperature, so the resistance value of twin-core heating line 5 continues to increase, make the 26 resistance R 26 of PTC testing circuit 272, the 27 resistance R 27 obtained sampling voltages will continue to diminish, when the sampling voltage that obtains when positive input pin 2521 is lower than the reference voltage of negative input pin 2522, described output pin 2523 will be exported the tenth tripod 6113 that electronegative potential is given the microchip 61 of control circuit, after the tenth tripod 6113 of described microchip 61 detects electronegative potential, to make the 17 pin 6117 of microchip 61 stop to export trigger pulse, make the second thyristor T2 of on-off circuit 29 cut off output, and then make twin-core heating line 5 stop heating, twin-core heating line 5 after stopping to heat reduces gradually because of temperature, make the resistance value of PTC heating resistor line 57 diminish gradually, cause the 26 resistance R 26 of PTC testing circuit 272, the 27 resistance R 27 obtained sampling voltages will become big gradually, when the sampling voltage that obtains when positive input pin 2521 is higher than the reference voltage of negative input pin 2522, described output pin 2523 will be exported the tenth tripod 6113 that noble potential is given the microchip 61 of control circuit, after the tenth tripod 6113 of described microchip 61 detects noble potential, the 17 pin 6117 output trigger pulses of microchip 61 will be made, make the second thyristor T2 of on-off circuit 29 recover output, the PTC heating resistor 57 of twin-core heating line 5 is replied and is heated, resistance raises to cut off to export and stops to heat, resistance reduces to recover to export and continues to heat, and reaches the constant temperature effect with this cycle control;
See also shown in Figure 3, when the user passes through the selection button SW1 select File position of function selector circuit 7, the octal 6108 of the microchip 61 of control circuit 6, after detecting the switch signal of selecting button SW1 setting, it is shinny that described microchip 61 will be controlled the luminescence component of corresponding file position, and change the 9th pin 6109 of microchip 61 simultaneously, the tenth pin 6110, the current potential height of the 11 pin 6111 and the 12 pin 6112, make the negative input pin 2522 of second comparer 252, because of the 4th resistance R 4, the 5th resistance R 5, the 8th resistance R 8, the 9th resistance R 9, the tenth resistance R 10, the 11 resistance R 11, the various combination of the 12 resistance R 12, and the obtained reference voltage size of the negative input pin 2522 that changes second comparer 252, and then reach the function of setting twin-core heating line 5 temperature height;
See also Fig. 5 and cooperate shown in Figure 3, be provided with NTC resistive layer 56 by twin-core heating line 5 middle layers, when 5 work of twin-core heating line, electric current is flowed into by first end 571 that twin-core heating line 5 its PTC add thermoelectric group line 57, through NTC resistive layer 56, the leakage current that flows out by first end 551 of heater wire 55, flow into by NTC testing circuit 271 first ends again, through the 16 resistance R 16, convert comparative voltage to by the 4th diode D4 again, the negative input pin 2512 of supplying with first comparer 251 is as sampling voltage, the positive input pin 2511 of described first comparer 251, then obtain reference voltage by second end 232 of reference voltage circuit 23, therefore, when the product operate as normal, NTC characteristic because of the NTC resistive layer, be that resistance value reduces with the temperature increase, the leakage current of the feasible NTC resistive layer of flowing through is less, so sampling voltage that the negative input pin 2512 of first comparer 251 is obtained, also less than the obtained reference voltage of the positive input pin 2511 of first comparer 251, cause the output pin 2513 output noble potentials of first comparer 251, give the 6th pin 6106 of the microchip 61 of control circuit 6, after the 6th pin 6106 of described microchip 61 detects noble potential, the 17 pin 6117 normal output trigger pulses of microchip 61 will be made, continue heating with the PTC heating resistor line 57 of keeping twin-core heating line 5, if when the product malfunction, be that twin-core heating line 5 bulk temperatures or local temperature are when too high, the resistance Yin Wendu of NTC resistive layer raises and diminishes, the leakage current of the NTC resistive layer 56 in the middle of the feasible twin-core heating line 5 of flowing through increases, so sampling voltage that the negative input pin 2512 of first comparer 251 is obtained, will be greater than the obtained reference voltage of the positive input pin 2511 of first comparer 251, make the output pin 2513 output electronegative potentials of the comparer 251 of winning, give the 6th pin 6106 of the microchip 61 of control circuit 6, after the 6th pin 6106 of described microchip 61 detects electronegative potential, to make the 17 pin 6117 of microchip 61 stop to export trigger pulse, continue heating with the PTC heating resistor line 57 that stops twin-core heating line 5, and then reach the effect of product secondary overheat protector, and after temperature reduces, because of NTC resistive layer resistance value becomes big, leakage current diminishes, and will recover output and make product recover normal use;
See also Fig. 6 and cooperate shown in Figure 3, when control circuit 6 during normal and second thyristor T2 conducting heating, the 8th capacitor C 8 positive charge of circuit abnormality holding circuit 28, be that DC voltage VCC is through the 8th capacitor C 8, the 31 resistance R 31, when stopping to heat as if opening circuit as the second thyristor T2,8 reverse chargings of the 8th capacitor C, it is the power supply warp, the 34 resistance R 34, the 30 resistance R 30, the 6th diode D6, the 5th diode D5, the 8th capacitor C 8, DC voltage VCC, positive charge during by heating, reverse charging when not heating, periodic duty, make transistor Q1 trigger the first thyristor T1 conducting through the 33 resistance R 33, and make the twin-core heating line 5 can operate as normal, if when control circuit 6 faults, continue the output noble potential or the second thyristor T2 short circuit, cause twin-core heating line 5 to heat always, DC voltage VCC, through the 8th capacitor C 8, the 31 resistance R 31, after 8 positive charge a period of times of the 8th capacitor C are about 30 seconds, the voltage of the base stage B of transistor Q1 hangs down the volt at 0.7V (volt), transistor Q1 is ended, and then close the first thyristor T1, make twin-core heating line 5 stop heating;
Please consult shown in Figure 2 again, has the characteristic of PTC and NTC simultaneously by twin-core heating line 5 of the present utility model, and utilize the NTC characteristic of the NTC resistive layer 56 in the middle of the twin-core heating line 5, to detect the middle layer leakage current, reach the secondary overheat protector of control twin-core heating line 5 bulk temperatures or local temperature, simultaneously to detect PTC heating resistor 57 size of current, reach the control product temperature, and then effectively solution has heating line constant temperature weak effect now, promptly scrap behind the heating line excess temperature, and the purpose person of the Shu kind tool twin-core heating line heating control device of many disappearances such as heating line serviceable life is short;
Moreover, twin-core heating line 5 in the utility model also can be as shown in Figure 7, described twin-core heating line 5 innermost layers are heart yearn 54, spiral is arranged with PTC heating resistor line 57 on the described heart yearn 54, be covered with NTC resistive layer 56 in 57 outsourcings of described PTC heating resistor line again, on the described NTC resistive layer 56 again spiral be arranged with heater wire 55, form at described heater wire 55 outsourcing insulating layer coatings 58 again;
Again again, twin-core heating line 5 in the utility model also can be as shown in Figure 8, described twin-core heating line 5 innermost layers are heart yearn 54, spiral is arranged with PTC heating resistor line 59 on the described heart yearn 54, be covered with NTC resistive layer 56 in 59 outsourcings of described PTC heating resistor line again, on the described NTC resistive layer 56 again spiral be arranged with another PTC heating resistor line 57, form at described another PTC heating resistor line 57 outsourcing insulating layer coatings 58 again;
Circuit abnormality holding circuit 28 in the utility model control device 2 can be further as shown in Figure 9, described circuit abnormality holding circuit 28 is provided with one first bidirectional silicon-controlled rectifier TRAIC1, first end 261 of the first end A11 of the described first bidirectional silicon-controlled rectifier TRAIC1 and load detecting circuit 26 joins with second end 572 of twin-core heating line 5 its PTC heater circuit lines 57, the second end A12 of the described first bidirectional silicon-controlled rectifier TRAIC1 and first end 291 of on-off circuit 29 join, the control end G11 of the described first bidirectional silicon-controlled rectifier TRAIC1 is connected in series 1 the tenth capacitor C 10, one the 40 resistance R 40, described the 40 resistance R 40 other ends are connected to the 39 resistance R 39 and a silicon reference diode ZD2 respectively, described the 39 resistance R 39 other ends then join with the 17 pin 6117 of control circuit 6 its microchips 61, and the described silicon reference diode ZD2 other end then connects ground connection;
Again, described on-off circuit 29 also can be as shown in Figure 9, described on-off circuit 29 includes: one second bidirectional silicon-controlled rectifier TRAIC2, the first end A21 of the described second bidirectional silicon-controlled rectifier TRAIC2 and the 3rd end 283 of circuit abnormality holding circuit 28 join, the second end A22 of the described second bidirectional silicon-controlled rectifier TRAIC2 and first end 2721 of PTC testing circuit 272 join, the control end G21 of the described second bidirectional silicon-controlled rectifier TRAIC2 is connected in series one the 37 resistance R 37 ground connection, and is connected in series one the 38 resistance R 38, be connected to the 17 pin 6117 of control circuit 6 its microchips 61 after the 9th capacitor C 9;
Please consult Fig. 9 again and cooperate shown in Figure 10, when the 17 pin 6117 of microchip 61 is exported noble potentials, the described first bidirectional silicon-controlled rectifier TRAIC1 and the second bidirectional silicon-controlled rectifier TRAIC2 can conductings, if when the 17 pin 6117 of microchip 61 is exported electronegative potentials, the described first bidirectional silicon-controlled rectifier TRAIC1 and the second bidirectional silicon-controlled rectifier TRAIC2 can end, and when the first bidirectional silicon-controlled rectifier TRAIC1 or one of them damage short circuit of the second bidirectional silicon-controlled rectifier TRAIC2, another good bidirectional silicon-controlled rectifier still can normally be accepted microchip 61 control conductings or end, but and make still operate as normal of twin-core heating line 5;
For also being added, the utility model shows its progressive and practicality, hereby as follows with one comparative analysis of existing do:
Prior art:
1, namely scraps after the fusing of line with heating function excess temperature.
2, can't reuse, not be inconsistent economic benefits.
3, also cause the too high line with heating function that burns of line with heating function local temperature.
4, service life comparatively of short duration, burn easily.
The utility model advantage:
1, the line with heating function excess temperature is the NTC resistive layer in the middle of utilizing, and detects leakage current and reaches the protection purpose.
2, after overheat protector started, the problem for the treatment of solved, and still can continue to use.
3, it is too high to prevent and detect the line with heating function local temperature, the disappearance of burning line with heating function that causes.
4, long service life.
5, the constant temperature effect is good.
More than explanation is novel just illustrative for this, and nonrestrictive, ordinary skill people The member understands, and in the situation that does not break away from the spirit and scope that following claims limit, can make and being permitted Revise changes more, or equivalence, but all will fall in the protection domain of the present utility model.

Claims (10)

1, a kind of tool twin-core heating line heating control device, it is characterized in that: it comprises:
One twin-core heating line, described twin-core heating line is provided with PTC heating resistor line, NTC resistive layer, heater wire, heart yearn, and the PTC heating resistor line of described twin-core heating line is provided with first end and second end, and described heater wire is provided with first end and second end;
One control device, described control device includes:
Dc voltage circuit, described dc voltage circuit are provided with first end and second end;
Control circuit, described control circuit includes: a microchip, described microchip is provided with first pin, crus secunda, tripod, the 5th pin, the 6th pin, the 7th pin, octal, the 9th pin, the tenth pin, the 11 pin, the 12 pin, the tenth tripod, the 14 pin, the 15 pin, the 17 pin, the tenth octal, and second end of described the 14 pin and dc voltage circuit joins, and described again the 5th pin is to connect ground connection;
First comparer, described first comparer is provided with direct current pressure side, earth terminal, positive input pin, negative input pin and output pin, second end of described direct current pressure side and dc voltage circuit joins, described earth terminal connects ground connection, and the 6th pin of the microchip in described output pin and the control circuit joins;
Second comparer, described second comparer is provided with direct current pressure side, earth terminal, positive input pin, negative input pin and output pin, second end of described direct current pressure side and dc voltage circuit joins, described earth terminal connects ground connection, and the tenth tripod of the microchip in described output pin and the control circuit joins;
The sync signal input circuit, described sync signal input circuit is provided with first end and second end, first end of described first end and dc voltage circuit joins, described second end then with control circuit in the tripod of microchip join;
Reference voltage circuit, described reference voltage circuit is provided with direct current pressure side, first end, second end, the 3rd end and the 4th end, second end of described direct current pressure side and dc voltage circuit joins, first end of described first end and sync signal input circuit joins, the positive input pin of described second end and first comparer joins, the negative input pin of described the 3rd end and second comparer joins, and first end of described the 4th end and file position regulating circuit joins;
File position regulating circuit, described file position regulating circuit is provided with first end, second end, the 3rd end, the 4th end, the 4th end of described first end and reference voltage circuit and the 12 pin of the microchip in the control circuit join, the 11 pin of the microchip in described second end and the control circuit joins, the tenth pin of the microchip in described the 3rd end and the control circuit joins, and the 9th pin of the microchip in described the 4th end and the control circuit joins;
The NTC testing circuit, described NTC testing circuit is provided with first end and second end, and first end of described first end and its heater wire of described twin-core heating line joins, and the negative input pin of described second end and first comparer joins;
The PTC testing circuit, described PTC testing circuit is provided with first end and second end, and the positive input pin of described second end and second comparer joins;
On-off circuit, described on-off circuit are provided with first end, second end and the 3rd end, and first end of described second end and described PTC testing circuit joins, and the 17 pin of the microchip in described the 3rd end and the control circuit joins;
Load detecting circuit, described load detecting circuit are provided with first end and second end, and second end that described first end and its PTC of described twin-core heating line add thermoelectric group line joins, and the tenth octal of the microchip in described second end and the control circuit joins;
The circuit abnormality holding circuit, described circuit abnormality holding circuit is provided with direct current pressure side, first end, second end and the 3rd end, second end of described direct current pressure side and dc voltage circuit joins, first end of described first end and load detecting circuit joins, described second end and twin-core generate heat, and its PTC of line adds first end of thermoelectric group line and first end of reference voltage circuit joins, and first end of described the 3rd end and on-off circuit joins;
Function selector circuit, described function selector circuit are provided with first end and second end, and the octal of the microchip in described first end and the control circuit joins, and described second end connects ground connection.
2, a kind of tool twin-core heating line heating control device according to claim 1, it is characterized in that: described file position regulating circuit includes: the 9th resistance; The tenth resistance, described the tenth resistance one end and the 9th resistance join; The 11 resistance, described the 11 resistance one end and the tenth resistance join; The 12 resistance, described the 12 resistance one end and the 11 resistance join, and the other end then connects ground connection.
3, a kind of tool twin-core heating line heating control device according to claim 1, it is characterized in that: described NTC testing circuit includes: the 16 resistance; The 17 resistance, described the 17 resistance one end connects ground connection; The 4th diode, described the 4th diode one end and the 17 resistance join; The 7th diode, described the 7th diode one end joins with the 16 resistance and the 4th diode, and the other end then connects ground connection; The 7th electric capacity, described the 7th electric capacity one end and the 4th diode join, and the other end then connects ground connection.
4, a kind of tool twin-core heating line heating control device according to claim 1, it is characterized in that: described PTC testing circuit includes: the 25 resistance; The 26 resistance, described the 26 resistance one end and the 25 resistance join, and the other end then connects ground connection; The 27 resistance, described the 27 resistance one end and the 26 resistance join, and the other end then connects ground connection.
5, a kind of tool twin-core heating line heating control device according to claim 1, it is characterized in that: described on-off circuit includes: second thyristor, described second thyristor is provided with anode, negative electrode and gate pole; The 28 resistance, the gate of described the 28 resistance one end and second thyristor joins, and the other end then connects ground connection; The 29 resistance, described the 29 resistance one end and the 28 resistance join, and described again second thyristor can replace by bidirectional silicon-controlled rectifier.
6, a kind of tool twin-core heating line heating control device according to claim 1, it is characterized in that: described load detecting circuit includes: the tenth electric capacity, described the tenth electric capacity one end connects ground connection; The 35 resistance, described the 35 resistance one end and the tenth electric capacity join, and the other end then connects ground connection; The 36 resistance, described the 36 resistance one end and the 35 resistance join.
7, a kind of tool twin-core heating line heating control device according to claim 1, it is characterized in that: described circuit abnormality holding circuit includes: transistor, described transistor are provided with base stage, the collection utmost point and emitter-base bandgap grading; First thyristor, described first thyristor is provided with anode, negative electrode and gate pole; The 8th electric capacity; The 5th diode, described the 5th diode one end and the 8th electric capacity join; The 6th diode, described the 6th diode one end and the 5th diode join; The 30 resistance, the 30 resistance one end and the 6th diode join, and the other end then joins with the negative electrode of first thyristor; The 31 resistance, described the 31 resistance one end and the 8th electric capacity and the 5th diode, the other end then connects ground connection; The 32 resistance, described the 32 resistance one end and the 31 resistance join, and the other end then joins with transistorized base stage; The 33 resistance, described the 33 resistance one end and transistorized emitter-base bandgap grading join, and the other end then joins with the gate of first thyristor; The 34 resistance, described the 34 resistance one end and the 30 resistance join, and the described again first thyristor bidirectional silicon-controlled rectifier replaces.
8, tool twin-core heating line heating control device according to claim 1, it is characterized in that: first end of described NTC testing circuit also can be only joins with described second end of its heater wire of twin-core heating line, or first end of described NTC testing circuit joins with first end and second end of its heater wire of twin-core heating line simultaneously.
9; tool twin-core heating line heating control device according to claim 1; it is characterized in that: described circuit abnormality holding circuit includes: one first bidirectional silicon-controlled rectifier; second end of first end of described first bidirectional silicon-controlled rectifier and first end of load detecting circuit and its PTC heater circuit line of twin-core heating line joins; second end of described first bidirectional silicon-controlled rectifier and first end of on-off circuit join; the control end of described first bidirectional silicon-controlled rectifier is connected in series 1 the tenth electric capacity; one the 40 resistance; described the 40 resistance other end then joins with the 39 resistance and a silicon reference diode; described the 39 resistance other end then joins with the 17 pin of its microchip of control circuit, and the described silicon reference diode other end then connects ground connection.
10, tool twin-core heating line heating control device according to claim 1; it is characterized in that: described on-off circuit includes: one second bidirectional silicon-controlled rectifier; first end of described second bidirectional silicon-controlled rectifier and the 3rd end of circuit abnormality holding circuit join; second end of described second bidirectional silicon-controlled rectifier and first end of PTC testing circuit join; the control end of described second bidirectional silicon-controlled rectifier is connected in series one the 37 resistance eutral grounding, and is connected in series the 17 pin that is connected to its microchip of control circuit behind one the 38 resistance, the 9th electric capacity.
CNU2007201812079U2007201812079U 2007-10-18 2007-10-18 Heating control device with dual-core heating line Expired - Lifetime CN201097239Y (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101592962B (en) * 2009-05-06 2011-12-21 宁波锦春电器有限公司 Temperature control device of PTC/NTC electrical heating element
CN102802288A (en) * 2011-05-25 2012-11-28 王清传 Safety control structure for heating wires
CN103019269A (en) * 2011-09-27 2013-04-03 香港塔祈巴那电器有限公司 Temperature controller for warming
CN103197711A (en) * 2013-02-28 2013-07-10 彭凯文 Negative temperature coefficient (NTC) single temperature control circuit and temperature control method thereof
CN103294083A (en) * 2013-02-28 2013-09-11 彭凯文 PTC and NTC double-temperature-control circuit and temperature control method thereof
CN103294082A (en) * 2012-03-02 2013-09-11 王清传 Temperature control circuit capable of controlling two heating devices
CN103439994A (en) * 2013-07-24 2013-12-11 彭凯文 PTC/NTC double-control temperature control device
TWI454873B (en) * 2012-03-02 2014-10-01 Temperature control circuit for two heating devices
CN107105524A (en) * 2017-05-22 2017-08-29 宁波百乐威电器有限公司 Temperature control and protection circuit system for PTC/NTC heating wire
US11765794B2 (en) 2019-02-28 2023-09-19 Fka Distributing Co., Llc Portable heating apparatus with temperature-retaining component

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101592962B (en) * 2009-05-06 2011-12-21 宁波锦春电器有限公司 Temperature control device of PTC/NTC electrical heating element
CN102802288A (en) * 2011-05-25 2012-11-28 王清传 Safety control structure for heating wires
CN103019269A (en) * 2011-09-27 2013-04-03 香港塔祈巴那电器有限公司 Temperature controller for warming
CN103294082A (en) * 2012-03-02 2013-09-11 王清传 Temperature control circuit capable of controlling two heating devices
TWI454873B (en) * 2012-03-02 2014-10-01 Temperature control circuit for two heating devices
CN103197711B (en) * 2013-02-28 2015-05-20 彭凯文 Negative temperature coefficient (NTC) single temperature control circuit and temperature control method thereof
CN103294083A (en) * 2013-02-28 2013-09-11 彭凯文 PTC and NTC double-temperature-control circuit and temperature control method thereof
CN103294083B (en) * 2013-02-28 2015-05-20 彭凯文 PTC and NTC double-temperature-control circuit
CN103197711A (en) * 2013-02-28 2013-07-10 彭凯文 Negative temperature coefficient (NTC) single temperature control circuit and temperature control method thereof
CN103439994A (en) * 2013-07-24 2013-12-11 彭凯文 PTC/NTC double-control temperature control device
CN103439994B (en) * 2013-07-24 2017-04-05 浙江绿萌健康科技股份有限公司 PTC/NTC dual control temperature control devices
CN107105524A (en) * 2017-05-22 2017-08-29 宁波百乐威电器有限公司 Temperature control and protection circuit system for PTC/NTC heating wire
US11765794B2 (en) 2019-02-28 2023-09-19 Fka Distributing Co., Llc Portable heating apparatus with temperature-retaining component

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